Heat Capacity Heat capacity 200J/K Heat capacity 300J/K

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Presentation transcript:

Heat Capacity Heat capacity 200J/K Heat capacity 300J/K Heat capacity is the heat required to increase the temperature of a body by 1 Kelvin. It cannot be used as a comparison of heating ability as the mass of the body will also affect the heat required.

Specific Heat Capacity This is the heat required to change the temperature of 1 Kg of a substance by 1 Kelvin. C = specific heat capacity E = heat energy M = mass in Kg ΔT= change in temperature Unit : J/KgK

Substance Air 1000 Aluminium(Al) 904 Water 4200 Argon(Ar) 520 Oil 380 JK-1kg-1 Air 1000 Aluminium(Al) 904 Water 4200 Argon(Ar) 520 Oil 380 Carbon Dioxide(CO2) 843 Copper(Cu) 383 Gold(Au) 129 Helium(He) 5200 Hydrogen(H2) 14300 Iron(Fe) 449 Lead(Pb) 127 Mercury(Hg) 139

How much energy is needed to increase the temperature of the following by 10oC. a) 2kg of water b) 8Kg of copper c) 2 Kg of oil 2. Calculate the rise in temperature when 500g of water is given 300J of energy. 3. What energy is released when a 30 Kg bath of water cools by 15 oC? If this heat is absorbed by the 800g of air in a bathroom, how much does the temperature of the air increase?